This is a thing i don't understand well. It's too early for Caulifla because she supposedly doesn't have enough unique moves, but then the alternative is to instead make up a whole new moveset for Bulma-in-a-mech?
How does that work? Seems so unlikely to me. Would be pretty cool though.
Honestly, that would be my same argument point too and why I'd throw Bulma in the dumpster fire with the rest of the "Most likely not going to happen" choices. Main reason being is that for what little that we've seen of Caulifla and Kale, you know what they've done that Bulma hasn't done?
Throw a punch.
And I'm not talking in the comedic "clock someone over the head" punch, but an actual punch as if to defend herself (or at least from what I can recall with my lack of Dragon Ball knowledge). Even without my DB knowledge, if we really needed a "mech suit" in Dragon Ball FighterZ, I would think that Pilaf would have a better chance of getting in than Bulma since we did see them with an actual mech (three mechs merged into one in the pic below, but you get the idea).
Videl hasnt done anything in Super that they could pull from did she?
Unless if being a mother or holding hands to turn Goku into a God counts, I can't really say there's much...